High expectations are placed on aggregate BN powders as high thermal conductivity materials with heat dissipation and insulation properties on the same level as ceramic materials for use in the heat-dissipating insulation sheets of power modules. High thermal conductivity insulation sheets improve the heat dissipation of power modules, enabling downsizing and higher capacity. A cross-sectional photograph of a prototype sheet (filling rate: 50 vol.%) produced by the Functional Material Research Dept. of the Steel Research Laboratory of JFE Steel by mixing an aggregate BN powder (HP-40MF100) an epoxy type resin and forming under a high-pressure, high-temperature atmosphere. While retaining their original morphology, the constituent particles of the aggregate BN powder in the resin sheet have not oriented in the in-plane direction, and the resin has also filled the interior of the aggregated particles, resulting in forming without generation of voids. The produced sheet (filling rate: 50 vol.%) has a thermal conductivity of 10 W/m-K or higher and a 10 kV or higher withstand voltage. The aggregate BN powders Mizushima Ferroalloy developed are fillers in high thermal conductivity insulation resin sheets of automotive and industrial power modules. With a larger capacity and higher voltage power modules predicted, these new aggregate BN powders are expected to be useful as products that meet customer needs. If you are looking for high quality, high purity, and cost-effective Boron Nitride, or if you require the latest price of Boron Nitride, please feel free to email contact mis-asia.